Check valve operating in the direction of normal flow



Jan. 6, 1931. wfGo'ERG 1,788,358

' CHECK! VALVE OPERATING IN THE DVIRECTION OF NORMAL FLOW Origihal Filed Sept. 26, 1924 11v VENTOR v F ATTORNEY Patented Jan 6, 1931 UNITED STATES PATENT OFFICE.

WALTER GOERG, OF WOODCLIFF, NEW JERSEY, ASSIGNOR TO AIR REDUCTION COM PANY, INCORPORATED, OF NEW YORK, N. Y., A CORPORATION OF NEW YORK CHECK VALVE OPERATING IN THE DIRECTION OF NORMAL FLOW Original application filed September 26, 1924, Serial No. 740,138. Divided and this application filed April 4, 1928. 'SerialNo. 267,418.

The purpose of the invention is to provide a simple, efiective and completely automatic device for checking abnormal fiow or pressure proceeding or acting in the direction of normal flow, in a gas line or main or other fluid conduit or passage, and for automat ically restoring full flow when conditions have become sufiiciently equalized at the upstream and downstream sides of the device.

The device is placed substantially horizontally, or at an inclination, in the conduit and embodies a ball chamber with a main port, and a by-pass past saidmain port from the upstream to the downstream side of the fluid or of excessive pressure, or pressure differential, proceedin from the source of supply, the ball is close temporarily against the main ort. As the result of fluid passing throng the restricted .by-pass, the pressure at the downstream side of the main port is allowed to build up to a value at which the ball is no longer held against the main port and therefore rolls back down the incline,

reo ening the assage.

frhportant advantages of this device are that it does not rely upon a spring, that itreguiresno slidably guided parts and'no walls.

isposed across'the interior of the chamber and that it permits of substantially straightline flow.

In the accompanying drawings forming part hereof:

, Fig.1 is a view partly in longitudinal section and partly in elevation of a portion. of a conduit containing I the invention, the ball being shown in two positions in full and broken lines; and I Fig. 2 is a cross-section on the line 2-2 of The numeral 4 designates certain pipe and fitting elements of a conduit, for example, a gas line. The arrows indicate the direction of flow from the source toward the point of consumption or delivery, or toward a piece' of apparatus which it is desirable to protect tions of the two parts being screw-threaded atv 13 and 14 for connection to the adjoining portions of the line. The bore of the outlet section 11 constitutes a main ducting the normal flow of fluld, and'at the entrance end of this port, in the said section, a conical seat 15 is formed, providing an incline up which a ball 16 of substantial mass must be driven to seat against the seat. The

closure is preferably a solid rubber ball, of which the rubber is dead rather than springy.

Fine or restricted by-pass ports 17, one, two or more in number, are drilled diagonally through the wall of the section 11, the inlets of the by-pass ports being outside the ring of actual seating of the ball, and their outlets opening into the main port beyond the seat.

ort for con-' The massof the ball in relation to the inv cline 15 is such that the ball remains away from closing relation to the main port during ordinary conditions of flow and pressure.

When the flow is first turned. on, if there should be a sudden rush of fluid which it would be undesirable to allow to. proceed beyond the checking device, the ball will be driven up,the incline into closing engage- 1 ment with the main port. Thereby the flow is substantially out 011' and the influence of excessive pressure von farther parts of the system is out 01f. The flow is not entirely closed, however, since the restricted by-pass orifices 17 remain open. The fluid which passes through these orifices gradually, within a certain period, which may be brief or more rolonged depending upon the conditions, uilds up pressure in the portion of the conduit or system at the downstream side of the main ort, and eventually a balance results whic permits the ball to roll down the incline away from the main port, thereby restoring the free assageway.

If for any reason urmg the operation of too ' her with a main outlet port t the systein the rate (if flow or the pressure difie'rential should-become too high event of a break in the line or system the checking device, the closure will become as in operative, cutting off all but a minor flow.

The invention is applicable for various specific purposes and in various systems for performing functions of the general kind indicated.

This application is a division of a plication Serial No. 740,136, filed September 26, 1924..

I claim: I

1. In a'fluid line, a device for checking abv normal 'flow proceeding in the direction of normal flow, said device havingla bfarll cham ere om an an incline leading to said port, and a ball lying in said ball chamber adapted to be driven by the pressure u said incline to close said main port, there eing a restricted by-pass past the main port thus closed for building up pressure beyond the closed main port to a'point such that the ball will roll away from said ort.

2. a fluid line, a device for checking abnormal flow proceeding in the direction of normal flow, said device havin a ball chamber with a main outlet port t erefrom, and a rubber ball in-sai'd chamber adapted to be driven by the pressure to close said main port, there being a restricted by-pass past the main port thus closed for bulldlng up pre'ssure beyond the closed main port to a point such that the ball will roll away from said port.

WALTER GOERG.

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